Heat sealing apparatus



FIG. 1 is a front elevational view of a heat sealing apparatus showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a front and left perspective view thereof in an alternative position.

The broken lines show portions of a heat sealing apparatus that form no part of the claimed design.

The grey scale portion of a heat sealing apparatus forms no part of the claimed design. 

CLAIM The ornamental design for a heat sealing apparatus, as shown and described. 